Castlemaine Post Office Weather Records (ASN00088014)

Record envelope, standing records and threshold days for Castlemaine Post Office (ASN00088014), Australia, with 61 years of record.

Key Facts for Castlemaine Post Office

Castlemaine Post Office (ASN00088014) is a weather station in Australia at -37.10 latitude and 144.20 longitude, 311 m (1,020 ft) above sea level.
The station reports from 1906 to 1966, 61 years of record.
1,026 records set at Castlemaine Post Office still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Castlemaine Post Office set a daily record precipitation of 46.7 mm (1.8 in) on 13 January 1966.

About the Station

Location: Australia, -37.10 latitude, 144.20 longitude.
Elevation: 311 m (1,020 ft).
Period of record: 1906 to 1966, 61 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Castlemaine Post Office. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Castlemaine Post Office, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	40.6 C (105.1 F)	2.5 C (36.5 F)	n/a	n/a
Feb	37.8 C (100.0 F)	5.6 C (42.1 F)	n/a	n/a
Mar	37.8 C (100.0 F)	-1.1 C (30.0 F)	n/a	n/a
Apr	22.8 C (73.0 F)	-0.8 C (30.6 F)	n/a	n/a
May	21.7 C (71.1 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	15.0 C (59.0 F)	-4.4 C (24.1 F)	n/a	n/a
Jul	n/a	-3.3 C (26.1 F)	n/a	n/a
Aug	19.7 C (67.5 F)	-3.3 C (26.1 F)	n/a	n/a
Sep	26.7 C (80.1 F)	-1.1 C (30.0 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-2.5 C (27.5 F)	n/a	n/a
Nov	n/a	2.2 C (36.0 F)	n/a	n/a
Dec	n/a	3.6 C (38.5 F)	n/a	n/a

Which Years Hold Standing Records

1,026 standing records

1,026 records at Castlemaine Post Office still stand. 1965 holds the most, with 933.

Wettest Day of Each Month

Oct: 134.6 mm (5.3 in)

The wettest day on record for each calendar month at Castlemaine Post Office. The most was 134.6 mm (5.3 in) on 22 October 1934.

Record daily precipitation for each month at Castlemaine Post Office
Month	Record daily precipitation (mm)	Date
Jan	47.0 mm (1.9 in)	15 January 1953
Feb	109.2 mm (4.3 in)	26 February 1946
Mar	67.1 mm (2.6 in)	7 March 1910
Apr	53.8 mm (2.1 in)	14 April 1931
May	44.2 mm (1.7 in)	24 May 1951
Jun	38.9 mm (1.5 in)	18 June 1955
Jul	47.0 mm (1.9 in)	27 July 1936
Aug	65.0 mm (2.6 in)	20 August 1909
Sep	98.3 mm (3.9 in)	23 September 1916
Oct	134.6 mm (5.3 in)	22 October 1934
Nov	73.7 mm (2.9 in)	26 November 1959
Dec	115.1 mm (4.5 in)	1 December 1933

Period of Record Coverage

1965 to 1966

2 years of record at Castlemaine Post Office, 1965 to 1966. 2 years have data for under 90 percent of days and are left out of rankings: 1965, 1966.

Latest Records

Latest records at Castlemaine Post Office
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
13 January 1966	Castlemaine Post Office, AU	daily rain	46.7 mm (1.8 in)	33.2 mm (1.3 in)	40 years	58 of 100 (Notable)
24 November 1965	Castlemaine Post Office, AU	daily rain	14.5 mm (0.6 in)	5.6 mm (0.22 in)	35 years	20 of 100 (Routine)
11 November 1965	Castlemaine Post Office, AU	daily rain	35.6 mm (1.4 in)	27.5 mm (1.1 in)	10 years	43 of 100 (Notable)
8 October 1964	Castlemaine Post Office, AU	daily rain	22.1 mm (0.9 in)	13.0 mm (0.5 in)	9 years	20 of 100 (Routine)
29 September 1964	Castlemaine Post Office, AU	daily rain	17.5 mm (0.7 in)	8.1 mm (0.32 in)	11 years	17 of 100 (Routine)
4 September 1964	Castlemaine Post Office, AU	daily rain	20.3 mm (0.8 in)	13.9 mm (0.5 in)	16 years	20 of 100 (Routine)
26 May 1964	Castlemaine Post Office, AU	daily rain	16.5 mm (0.6 in)	4.3 mm (0.17 in)	31 years	19 of 100 (Routine)
9 April 1964	Castlemaine Post Office, AU	daily rain	26.2 mm (1.0 in)	19.8 mm (0.8 in)	40 years	42 of 100 (Notable)
12 February 1964	Castlemaine Post Office, AU	daily rain	13.7 mm (0.5 in)	8.4 mm (0.33 in)	8 years	13 of 100 (Routine)
23 March 1963	Castlemaine Post Office, AU	daily rain	15.0 mm (0.6 in)	12.0 mm (0.5 in)	12 years	19 of 100 (Routine)
11 March 1963	Castlemaine Post Office, AU	daily rain	18.0 mm (0.7 in)	2.0 mm (0.08 in)	24 years	13 of 100 (Routine)
29 January 1963	Castlemaine Post Office, AU	daily rain	22.6 mm (0.9 in)	4.6 mm (0.18 in)	8 years	12 of 100 (Routine)
1 August 1962	Castlemaine Post Office, AU	daily rain	12.2 mm (0.5 in)	2.3 mm (0.09 in)	52 years	20 of 100 (Routine)
24 July 1962	Castlemaine Post Office, AU	daily rain (Tie)	24.9 mm (1.0 in)	tie	0 years	1 of 100 (Routine)
25 May 1962	Castlemaine Post Office, AU	daily rain	8.9 mm (0.35 in)	2.0 mm (0.08 in)	11 years	10 of 100 (Routine)
23 May 1962	Castlemaine Post Office, AU	daily rain	18.5 mm (0.7 in)	7.1 mm (0.28 in)	4 years	15 of 100 (Routine)
15 December 1961	Castlemaine Post Office, AU	daily rain	27.9 mm (1.1 in)	7.8 mm (0.31 in)	47 years	26 of 100 (Routine)
14 December 1961	Castlemaine Post Office, AU	daily rain	19.8 mm (0.8 in)	13.4 mm (0.5 in)	43 years	20 of 100 (Routine)
24 July 1961	Castlemaine Post Office, AU	daily rain	24.9 mm (1.0 in)	15.0 mm (0.6 in)	19 years	20 of 100 (Routine)
24 April 1961	Castlemaine Post Office, AU	daily rain	36.6 mm (1.4 in)	17.3 mm (0.7 in)	31 years	36 of 100 (Notable)

Extremes by Year

1906 to 1966

Yearly extremes at Castlemaine Post Office: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1965	37.3 C (99.1 F)	2
Coldest night (TNn)	-4.4 C (24.1 F)	1965	-1.0 C (30.3 F)	2
Wettest day (Rx1day)	134.6 mm (5.3 in)	1934	41.7 mm (1.6 in)	61
Wettest five days (Rx5day)	175.0 mm (6.9 in)	1934	60.2 mm (2.4 in)	61
Longest dry spell (CDD)	83 days	1923	32 days	61

Hottest day (TXx)

The hottest day of the year at Castlemaine Post Office, 1906 to 1966. The record is 40.6 C (105.1 F) in 1965, marked on the chart; the median year is 37.3 C (99.1 F).

Hottest day (TXx) at Castlemaine Post Office by year
Year	Hottest day (TXx)
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	40.6 C (105.1 F)
1966	33.9 C (93.0 F)

Coldest night (TNn)

The coldest night of the year at Castlemaine Post Office, 1906 to 1966. The record is -4.4 C (24.1 F) in 1965, marked on the chart; the median year is -1.0 C (30.3 F).

Coldest night (TNn) at Castlemaine Post Office by year
Year	Coldest night (TNn)
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	-4.4 C (24.1 F)
1966	2.5 C (36.5 F)

Wettest day (Rx1day)

The wettest day of the year at Castlemaine Post Office, 1906 to 1966. The record is 134.6 mm (5.3 in) in 1934, marked on the chart; the median year is 41.7 mm (1.6 in).

Wettest day (Rx1day) at Castlemaine Post Office by year
Year	Wettest day (Rx1day)
1906	73.2 mm (2.9 in)
1907	49.5 mm (1.9 in)
1908	46.7 mm (1.8 in)
1909	65.0 mm (2.6 in)
1910	67.1 mm (2.6 in)
1911	65.0 mm (2.6 in)
1912	53.1 mm (2.1 in)
1913	35.6 mm (1.4 in)
1914	58.4 mm (2.3 in)
1915	50.3 mm (2.0 in)
1916	98.3 mm (3.9 in)
1917	40.1 mm (1.6 in)
1918	41.7 mm (1.6 in)
1919	48.3 mm (1.9 in)
1920	33.5 mm (1.3 in)
1921	44.2 mm (1.7 in)
1922	63.8 mm (2.5 in)
1923	44.5 mm (1.8 in)
1924	60.5 mm (2.4 in)
1925	21.3 mm (0.8 in)
1926	23.1 mm (0.9 in)
1927	23.6 mm (0.9 in)
1928	41.7 mm (1.6 in)
1929	41.7 mm (1.6 in)
1930	43.9 mm (1.7 in)
1931	53.8 mm (2.1 in)
1932	44.2 mm (1.7 in)
1933	115.1 mm (4.5 in)
1934	134.6 mm (5.3 in)
1935	24.1 mm (0.9 in)
1936	47.0 mm (1.9 in)
1937	29.7 mm (1.2 in)
1938	23.9 mm (0.9 in)
1939	53.1 mm (2.1 in)
1940	24.4 mm (1.0 in)
1941	25.1 mm (1.0 in)
1942	36.6 mm (1.4 in)
1943	27.9 mm (1.1 in)
1944	22.4 mm (0.9 in)
1945	34.3 mm (1.4 in)
1946	109.2 mm (4.3 in)
1947	40.4 mm (1.6 in)
1948	35.8 mm (1.4 in)
1949	50.8 mm (2.0 in)
1950	31.8 mm (1.3 in)
1951	63.0 mm (2.5 in)
1952	29.0 mm (1.1 in)
1953	47.0 mm (1.9 in)
1954	75.9 mm (3.0 in)
1955	38.9 mm (1.5 in)
1956	38.4 mm (1.5 in)
1957	22.6 mm (0.9 in)
1958	27.7 mm (1.1 in)
1959	73.7 mm (2.9 in)
1960	39.4 mm (1.6 in)
1961	36.6 mm (1.4 in)
1962	32.0 mm (1.3 in)
1963	22.6 mm (0.9 in)
1964	26.2 mm (1.0 in)
1965	35.6 mm (1.4 in)
1966	46.7 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Castlemaine Post Office, 1906 to 1966. The record is 175.0 mm (6.9 in) in 1934, marked on the chart; the median year is 60.2 mm (2.4 in).

Wettest five days (Rx5day) at Castlemaine Post Office by year
Year	Wettest five days (Rx5day)
1906	81.1 mm (3.2 in)
1907	84.5 mm (3.3 in)
1908	47.7 mm (1.9 in)
1909	95.8 mm (3.8 in)
1910	77.3 mm (3.0 in)
1911	140.9 mm (5.5 in)
1912	80.6 mm (3.2 in)
1913	58.7 mm (2.3 in)
1914	58.4 mm (2.3 in)
1915	69.8 mm (2.7 in)
1916	146.5 mm (5.8 in)
1917	51.6 mm (2.0 in)
1918	100.4 mm (4.0 in)
1919	50.1 mm (2.0 in)
1920	57.7 mm (2.3 in)
1921	60.2 mm (2.4 in)
1922	73.2 mm (2.9 in)
1923	63.3 mm (2.5 in)
1924	81.9 mm (3.2 in)
1925	48.5 mm (1.9 in)
1926	35.1 mm (1.4 in)
1927	50.3 mm (2.0 in)
1928	112.0 mm (4.4 in)
1929	89.3 mm (3.5 in)
1930	86.9 mm (3.4 in)
1931	73.4 mm (2.9 in)
1932	59.4 mm (2.3 in)
1933	160.1 mm (6.3 in)
1934	175.0 mm (6.9 in)
1935	36.3 mm (1.4 in)
1936	70.3 mm (2.8 in)
1937	38.6 mm (1.5 in)
1938	26.2 mm (1.0 in)
1939	74.9 mm (2.9 in)
1940	28.2 mm (1.1 in)
1941	42.6 mm (1.7 in)
1942	52.6 mm (2.1 in)
1943	37.9 mm (1.5 in)
1944	31.0 mm (1.2 in)
1945	79.7 mm (3.1 in)
1946	113.5 mm (4.5 in)
1947	61.9 mm (2.4 in)
1948	42.2 mm (1.7 in)
1949	86.3 mm (3.4 in)
1950	46.5 mm (1.8 in)
1951	97.8 mm (3.9 in)
1952	49.5 mm (1.9 in)
1953	52.6 mm (2.1 in)
1954	91.4 mm (3.6 in)
1955	61.0 mm (2.4 in)
1956	66.5 mm (2.6 in)
1957	43.9 mm (1.7 in)
1958	46.0 mm (1.8 in)
1959	91.5 mm (3.6 in)
1960	54.7 mm (2.2 in)
1961	70.5 mm (2.8 in)
1962	45.5 mm (1.8 in)
1963	31.5 mm (1.2 in)
1964	53.4 mm (2.1 in)
1965	55.0 mm (2.2 in)
1966	51.5 mm (2.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Castlemaine Post Office, 1906 to 1966. The record is 83 days in 1923, marked on the chart; the median year is 32 days.

Longest dry spell (CDD) at Castlemaine Post Office by year
Year	Longest dry spell (CDD)
1906	10 days
1907	31 days
1908	33 days
1909	32 days
1910	24 days
1911	15 days
1912	33 days
1913	32 days
1914	40 days
1915	31 days
1916	43 days
1917	22 days
1918	32 days
1919	40 days
1920	40 days
1921	22 days
1922	35 days
1923	83 days
1924	20 days
1925	31 days
1926	72 days
1927	40 days
1928	35 days
1929	25 days
1930	38 days
1931	43 days
1932	28 days
1933	33 days
1934	51 days
1935	31 days
1936	33 days
1937	51 days
1938	29 days
1939	26 days
1940	22 days
1941	23 days
1942	44 days
1943	33 days
1944	29 days
1945	34 days
1946	20 days
1947	20 days
1948	41 days
1949	19 days
1950	32 days
1951	38 days
1952	21 days
1953	44 days
1954	33 days
1955	27 days
1956	28 days
1957	24 days
1958	29 days
1959	47 days
1960	15 days
1961	37 days
1962	27 days
1963	25 days
1964	37 days
1965	52 days
1966	16 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

58 years, 1907 to 1965

A day with at least 40.0 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 140.7 mm (5.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Castlemaine Post Office: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	40.0 mm (1.6 in)
5 years	58.7 mm (2.3 in)
10 years	73.9 mm (2.9 in)
25 years	96.9 mm (3.8 in)
50 years	117.2 mm (4.6 in)
100 years	140.7 mm (5.5 in)	Longer than the 58 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 58 years of values from 1907 to 1965.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 134.6 mm (5.3 in) in 1934; 115.1 mm (4.5 in) in 1933; 109.2 mm (4.3 in) in 1946.

Download the Data

Data for Castlemaine Post Office standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Castlemaine Post Office threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).